Mujin™ MJ300 Synthetic Mummy Sleeping Bag 39°F / 4°C — 1

Mujin™ MJ300 Synthetic Mummy Sleeping Bag 39°F / 4°C — 4

Mujin™ MJ300 Synthetic Mummy Sleeping Bag 39°F / 4°C

$39.99

Durable Outer Shell:
Made from
splash-proof polyester-silk spun fabric
(170T for MJ300, 190T for MJ600) to keep moisture out and enhance durability.
Skin-Friendly Lining:
The
190T pongee inner lining
is ultra-soft, ensuring a cozy and comfortable sleep.
Superior Insulation:
Filled with
650g (MJ300) or 1300g (MJ600) of hollow cotton
, providing excellent heat retention without adding bulk.
Adjustable Windproof Drawstring:
Locks in heat around your neck to prevent cold air from entering.
Insulated Hood:
Traps warm air inside for extra head protection on chilly nights.

Free standard US shipping
Contiguous 48 states & DC · 4–7 business days total

30-day returns
Merchant-paid return shipping. Read the policy

Questions about this item? [email protected]

Product brand: Naturehike

SKU: N08-C06-1CBA6B10577C Category: Sleep Systems

The details

Meet your next everyday essential.

Stay Warm, Sleep Comfortably?aDesigned for Your Outdoor Adventures

Reliable Warmth for Cold-Weather Camping

Naturehike's MJ Series Mummy Sleeping Bags are built for
spring, fall, and winter adventures
, offering excellent insulation and comfort. With two options tailored to different temperature needs:
MJ300
& Comfortable at
4℃ (39.2℉)
, ideal for cool weather.
MJ600
& Comfortable at
-5℃ (23℉)
, providing extra warmth for colder nights.

Premium Materials for Maximum Comfort

Durable Outer Shell:
Made from
splash-proof polyester-silk spun fabric
(170T for MJ300, 190T for MJ600) to keep moisture out and enhance durability.

Skin-Friendly Lining:
The
190T pongee inner lining
is ultra-soft, ensuring a cozy and comfortable sleep.

Superior Insulation:
Filled with
650g (MJ300) or 1300g (MJ600) of hollow cotton
, providing excellent heat retention without adding bulk.

Smart Features for Enhanced Warmth

Adjustable Windproof Drawstring:
Locks in heat around your neck to prevent cold air from entering.

Insulated Hood:
Traps warm air inside for extra head protection on chilly nights.

Smooth & Secure Zippers:
Features a
YKK anti-snag zipper
for effortless operation, and a
Velcro closure
to prevent accidental opening and heat loss.

Lightweight & Easy to Carry

Compact Storage:

MJ300:
Packs down to
Ø23*35cm (Ø9*13.8inch)

MJ600:
Packs down to
Ø30*42cm (Ø11.8*16.5inch)

Travel-Friendly:
Comes with a
drawstring compression sack
, making it easy to store and carry for
backpacking, hiking, and camping trips
.

Perfect For:

Backpacking & Camping
Mountaineering & Hiking
Road Trips & RV Travel
Canoeing & Outdoor Expeditions

Naturehike is committed to designing high-quality outdoor gear. If you have any questions, our support team is ready to assist you within 24 hours.

Know the fit

Specifications & selected options

Item: Mujin™ MJ300 Synthetic Mummy Sleeping Bag 39°F / 4°C
SKU: N08-C06-1CBA6B10577C
Product brand: Naturehike
Source sizes: Blue MJ300

, offering excellent insulation and comfort. With two options tailored to different temperature needs:

Premium Materials for Maximum Comfort

splash-proof polyester-silk spun fabric

650g (MJ300) or 1300g (MJ600) of hollow cotton

Lightweight & Easy to Carry

Ø23*35cm (Ø9*13.8inch)

Ø30*42cm (Ø11.8*16.5inch)

Choose & use with care

A few details before you begin.

Pack for expected conditions

Pack for expected conditions. Compare the information published for the exact item and keep the product name or SKU for reference.

Compare size and weight

Compare size and weight. Check the selected listing and variant, including the supplied components before ordering.

Check setup instructions

Check setup instructions. Use the directions supplied for your selected item. Contact support if an important detail is missing.

Follow the instructions supplied for the exact product. Features, limits and care directions are specific to the selected model.

Delivery, returns & support

Order preparation takes 1–3 business days, followed by 3–4 business days in transit: 4–7 business days in total. Standard shipping is free to the contiguous United States and DC, with no minimum order.

Request a return within 30 calendar days after delivery. We pay return shipping. After receipt, inspection and initiation of an approved refund take 5–7 business days.

Shipping Policy ↗Returns & Refunds ↗

Before you decide

Product questions

Where should I start when choosing camping gear?

Pack for expected conditions. Read the actual item description, included parts and options. The collection contains different models; a feature stated for one item should not be assumed for every product.

How do I check the size or fitting?

Compare size and weight. Compare the dimensions and compatibility stated for the selected item with the space or equipment you intend to use. If a required measurement is absent, send the product name or SKU to [email protected] before purchasing.

Are different colors or configurations available?

Available choices are shown on the individual product page. Select the actual option labels before adding a variable product to your cart. Photos and specifications should be read together with that choice; availability is specific to the selected configuration.

What should I check before using an item?

Check setup instructions. Follow the instructions supplied for the exact model. Do not assume that all items have the same materials, installation method, care directions or intended use.